package com.example.tests;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

import com.thoughtworks.xstream.XStream;

public class ContactDataGenerator {

	public static void main(String[] args) throws IOException {
		if (args.length < 3) {
			System.out.println("Please specify parameters: <amount of test data> <file> <format>");
			return;
		}
		
		int amount = Integer.parseInt(args[0]);
		File file = new File(args[1]);
		String format = args[2];
		
		if (file.exists()){
			System.out.println("File exists, please remote it manually: " + file);
			return;
		
		}
		
		List<ContactData> contacts = generateRandomContacts(amount);
		if ("csv".equals(format)){
			saveContactsToCsvFile(contacts, file);
		} else if ("xml".equals(format)) {
			saveContactsToXmlFile(contacts, file);
		} else {
			System.out.println("Unknown format " + format);
		}
	}

	private static void saveContactsToXmlFile(List<ContactData> contacts, File file) throws IOException {
		XStream xstream = new XStream();
		xstream.alias("contact", ContactData.class);
		String xml = xstream.toXML(contacts);
		FileWriter writer = new FileWriter(file);
		writer.write(xml);
		writer.close();
	}

	public static List<ContactData> loadContactsFromXmlFile(File file) throws IOException {
		XStream xstream = new XStream();
		xstream.alias("contact", ContactData.class);
		return (List<ContactData>) xstream.fromXML(file);		
	}

	private static void saveContactsToCsvFile(List<ContactData> contacts,
			File file) throws IOException {
	FileWriter writer = new FileWriter(file);
	for (ContactData contact : contacts) {
		writer.write(contact.getFirstname() + "," + contact.getLastname()
				+ "," + contact.getAddress() + "," + contact.getPhoneHome()
				+ "," + contact.getPhoneMobile() + ","
				+ contact.getPhoneWork() + "," + contact.getEmail() + ","
				+ contact.getSecondEmail() + "," + contact.getBirthdayDay()
				+ "," + contact.getBirthdayMonth() + ","
				+ contact.getBirthdayYear() + "," + contact.getGroupName()
				+ "," + contact.getAddressGroup() + ","
				+ contact.getPhoneGroup() + ",!" +"\n");
	}
	writer.close();		
	}
	
	public static List<ContactData> loadContactsFromCsvFile(File file) throws IOException {
		List<ContactData> list = new ArrayList<ContactData>();
		FileReader reader = new FileReader(file);
		BufferedReader bufferedReader = new BufferedReader(reader);
		String line = bufferedReader.readLine();
		while (line != null) {
			String[] part = line.split(",");
			ContactData contact = new ContactData()
				.withFirstName(part[0])
				.withLastName(part[1])
				.withAddress(part[2])
				.withPhoneHome(part[3])
				.withPhoneMobile(part[4])
				.withPhoneWork(part[5])
				.withEmail(part[6])
				.withSecondEmail(part[7])
				.withBirthdayDay(part[8])
				.withBirthdayMonth(part[9])
				.withBirthdayYear(part[10])
				.withGroupName(part[11])
				.withAddressGroup(part[12])
				.withPhoneGroup(part[13]);
			list.add(contact);
			line = bufferedReader.readLine();
		}
		bufferedReader.close();
		return list;
	}
	
	public static List<ContactData> generateRandomContacts(int amount) {
		List<ContactData> list = new ArrayList<ContactData>();		
		for (int i = 0; i < amount; i++) {
			ContactData contact = new ContactData()
				.withFirstName(generateRandomString())
				.withLastName(generateRandomString())
				.withAddress(generateRandomString())
				.withPhoneHome(generateRandomInt())
				.withPhoneMobile(generateRandomInt())
				.withPhoneWork(generateRandomInt())
				.withEmail("email@test")
				.withSecondEmail ("email2@test")
				.withBirthdayDay ("1")
				.withBirthdayMonth ("March")
				.withBirthdayYear ("1977")
				.withGroupName ("groupname3")
				.withAddressGroup(generateRandomString())
				.withPhoneGroup (generateRandomInt());
			list.add(contact);
		}		
		return list;

	}
	
	public static String generateRandomString(){
		Random rnd = new Random();
		if (rnd.nextInt(7) == 0) {
			return "";
		} else {
			return "test" + rnd.nextInt();}
	}
	
	public static String generateRandomInt(){
		Random rnd = new Random();
		if (rnd.nextInt(5) == 0) {
			return "";
		} else {
			return String.valueOf(rnd.nextInt(9999999));
		}
	}

}
